/*
FUSE: Filesystem in Userspace
- Copyright (C) 2001-2006 Miklos Szeredi <miklos@szeredi.hu>
+ Copyright (C) 2001-2008 Miklos Szeredi <miklos@szeredi.hu>
This program can be distributed under the terms of the GNU GPL.
See the file COPYING.
size_t size;
if (!*ppos) {
+ long value;
struct fuse_conn *fc = fuse_ctl_file_conn_get(file);
if (!fc)
return 0;
- file->private_data=(void *)(long)atomic_read(&fc->num_waiting);
+ value = atomic_read(&fc->num_waiting);
+ file->private_data = (void *)value;
fuse_conn_put(fc);
}
size = sprintf(tmp, "%ld\n", (long)file->private_data);
/*
FUSE: Filesystem in Userspace
- Copyright (C) 2001-2006 Miklos Szeredi <miklos@szeredi.hu>
+ Copyright (C) 2001-2008 Miklos Szeredi <miklos@szeredi.hu>
This program can be distributed under the terms of the GNU GPL.
See the file COPYING.
* Called with fc->lock, unlocks it
*/
static void request_end(struct fuse_conn *fc, struct fuse_req *req)
- __releases(fc->lock)
+__releases(&fc->lock)
{
void (*end) (struct fuse_conn *, struct fuse_req *) = req->end;
req->end = NULL;
wake_up(&req->waitq);
if (end)
end(fc, req);
- else
- fuse_put_request(fc, req);
+ fuse_put_request(fc, req);
}
static void wait_answer_interruptible(struct fuse_conn *fc,
struct fuse_req *req)
- __releases(fc->lock) __acquires(fc->lock)
+__releases(&fc->lock)
+__acquires(&fc->lock)
{
if (signal_pending(current))
return;
}
static void request_wait_answer(struct fuse_conn *fc, struct fuse_req *req)
- __releases(fc->lock) __acquires(fc->lock)
+__releases(&fc->lock)
+__acquires(&fc->lock)
{
if (!fc->no_interrupt) {
/* Any signal may interrupt this */
}
}
-void request_send(struct fuse_conn *fc, struct fuse_req *req)
+void fuse_request_send(struct fuse_conn *fc, struct fuse_req *req)
{
req->isreply = 1;
spin_lock(&fc->lock);
spin_unlock(&fc->lock);
}
-static void request_send_nowait_locked(struct fuse_conn *fc,
- struct fuse_req *req)
+static void fuse_request_send_nowait_locked(struct fuse_conn *fc,
+ struct fuse_req *req)
{
req->background = 1;
fc->num_background++;
flush_bg_queue(fc);
}
-static void request_send_nowait(struct fuse_conn *fc, struct fuse_req *req)
+static void fuse_request_send_nowait(struct fuse_conn *fc, struct fuse_req *req)
{
spin_lock(&fc->lock);
if (fc->connected) {
- request_send_nowait_locked(fc, req);
+ fuse_request_send_nowait_locked(fc, req);
spin_unlock(&fc->lock);
} else {
req->out.h.error = -ENOTCONN;
}
}
-void request_send_noreply(struct fuse_conn *fc, struct fuse_req *req)
+void fuse_request_send_noreply(struct fuse_conn *fc, struct fuse_req *req)
{
req->isreply = 0;
- request_send_nowait(fc, req);
+ fuse_request_send_nowait(fc, req);
}
-void request_send_background(struct fuse_conn *fc, struct fuse_req *req)
+void fuse_request_send_background(struct fuse_conn *fc, struct fuse_req *req)
{
req->isreply = 1;
- request_send_nowait(fc, req);
+ fuse_request_send_nowait(fc, req);
}
/*
*
* fc->connected must have been checked previously
*/
-void request_send_background_locked(struct fuse_conn *fc, struct fuse_req *req)
+void fuse_request_send_background_locked(struct fuse_conn *fc,
+ struct fuse_req *req)
{
req->isreply = 1;
- request_send_nowait_locked(fc, req);
+ fuse_request_send_nowait_locked(fc, req);
}
/*
BUG_ON(!cs->nr_segs);
cs->seglen = cs->iov[0].iov_len;
cs->addr = (unsigned long) cs->iov[0].iov_base;
- cs->iov ++;
- cs->nr_segs --;
+ cs->iov++;
+ cs->nr_segs--;
}
down_read(¤t->mm->mmap_sem);
err = get_user_pages(current, current->mm, cs->addr, 1, cs->write, 0,
kunmap_atomic(mapaddr, KM_USER1);
}
while (count) {
- int err;
- if (!cs->len && (err = fuse_copy_fill(cs)))
- return err;
+ if (!cs->len) {
+ int err = fuse_copy_fill(cs);
+ if (err)
+ return err;
+ }
if (page) {
void *mapaddr = kmap_atomic(page, KM_USER1);
void *buf = mapaddr + offset;
static int fuse_copy_one(struct fuse_copy_state *cs, void *val, unsigned size)
{
while (size) {
- int err;
- if (!cs->len && (err = fuse_copy_fill(cs)))
- return err;
+ if (!cs->len) {
+ int err = fuse_copy_fill(cs);
+ if (err)
+ return err;
+ }
fuse_copy_do(cs, &val, &size);
}
return 0;
/* Wait until a request is available on the pending list */
static void request_wait(struct fuse_conn *fc)
+__releases(&fc->lock)
+__acquires(&fc->lock)
{
DECLARE_WAITQUEUE(wait, current);
*/
static int fuse_read_interrupt(struct fuse_conn *fc, struct fuse_req *req,
const struct iovec *iov, unsigned long nr_segs)
- __releases(fc->lock)
+__releases(&fc->lock)
{
struct fuse_copy_state cs;
struct fuse_in_header ih;
return err;
}
+static int fuse_notify_poll(struct fuse_conn *fc, unsigned int size,
+ struct fuse_copy_state *cs)
+{
+ struct fuse_notify_poll_wakeup_out outarg;
+ int err;
+
+ if (size != sizeof(outarg))
+ return -EINVAL;
+
+ err = fuse_copy_one(cs, &outarg, sizeof(outarg));
+ if (err)
+ return err;
+
+ return fuse_notify_poll_wakeup(fc, &outarg);
+}
+
+static int fuse_notify(struct fuse_conn *fc, enum fuse_notify_code code,
+ unsigned int size, struct fuse_copy_state *cs)
+{
+ switch (code) {
+ case FUSE_NOTIFY_POLL:
+ return fuse_notify_poll(fc, size, cs);
+
+ default:
+ return -EINVAL;
+ }
+}
+
/* Look up request on processing list by unique ID */
static struct fuse_req *request_find(struct fuse_conn *fc, u64 unique)
{
err = fuse_copy_one(&cs, &oh, sizeof(oh));
if (err)
goto err_finish;
+
+ err = -EINVAL;
+ if (oh.len != nbytes)
+ goto err_finish;
+
+ /*
+ * Zero oh.unique indicates unsolicited notification message
+ * and error contains notification code.
+ */
+ if (!oh.unique) {
+ err = fuse_notify(fc, oh.error, nbytes - sizeof(oh), &cs);
+ fuse_copy_finish(&cs);
+ return err ? err : nbytes;
+ }
+
err = -EINVAL;
- if (!oh.unique || oh.error <= -1000 || oh.error > 0 ||
- oh.len != nbytes)
+ if (oh.error <= -1000 || oh.error > 0)
goto err_finish;
spin_lock(&fc->lock);
* This function releases and reacquires fc->lock
*/
static void end_requests(struct fuse_conn *fc, struct list_head *head)
+__releases(&fc->lock)
+__acquires(&fc->lock)
{
while (!list_empty(head)) {
struct fuse_req *req;
* locked).
*/
static void end_io_requests(struct fuse_conn *fc)
- __releases(fc->lock) __acquires(fc->lock)
+__releases(&fc->lock)
+__acquires(&fc->lock)
{
while (!list_empty(&fc->io)) {
struct fuse_req *req =
wake_up(&req->waitq);
if (end) {
req->end = NULL;
- /* The end function will consume this reference */
__fuse_get_request(req);
spin_unlock(&fc->lock);
wait_event(req->waitq, !req->locked);
end(fc, req);
+ fuse_put_request(fc, req);
spin_lock(&fc->lock);
}
}
/*
FUSE: Filesystem in Userspace
- Copyright (C) 2001-2006 Miklos Szeredi <miklos@szeredi.hu>
+ Copyright (C) 2001-2008 Miklos Szeredi <miklos@szeredi.hu>
This program can be distributed under the terms of the GNU GPL.
See the file COPYING.
parent = dget_parent(entry);
fuse_lookup_init(fc, req, get_node_id(parent->d_inode),
&entry->d_name, &outarg);
- request_send(fc, req);
+ fuse_request_send(fc, req);
dput(parent);
err = req->out.h.error;
fuse_put_request(fc, req);
return 0;
}
spin_lock(&fc->lock);
- fi->nlookup ++;
+ fi->nlookup++;
spin_unlock(&fc->lock);
}
fuse_put_request(fc, forget_req);
attr_version = fuse_get_attr_version(fc);
fuse_lookup_init(fc, req, nodeid, name, outarg);
- request_send(fc, req);
+ fuse_request_send(fc, req);
err = req->out.h.error;
fuse_put_request(fc, req);
/* Zero nodeid is same as -ENOENT, but with valid timeout */
{
fuse_release_fill(ff, nodeid, flags, FUSE_RELEASE);
ff->reserved_req->force = 1;
- request_send(fc, ff->reserved_req);
+ fuse_request_send(fc, ff->reserved_req);
fuse_put_request(fc, ff->reserved_req);
kfree(ff);
}
goto out_put_forget_req;
err = -ENOMEM;
- ff = fuse_file_alloc();
+ ff = fuse_file_alloc(fc);
if (!ff)
goto out_put_request;
req->out.args[0].value = &outentry;
req->out.args[1].size = sizeof(outopen);
req->out.args[1].value = &outopen;
- request_send(fc, req);
+ fuse_request_send(fc, req);
err = req->out.h.error;
if (err) {
if (err == -ENOSYS)
else
req->out.args[0].size = sizeof(outarg);
req->out.args[0].value = &outarg;
- request_send(fc, req);
+ fuse_request_send(fc, req);
err = req->out.h.error;
fuse_put_request(fc, req);
if (err)
req->in.numargs = 1;
req->in.args[0].size = entry->d_name.len + 1;
req->in.args[0].value = entry->d_name.name;
- request_send(fc, req);
+ fuse_request_send(fc, req);
err = req->out.h.error;
fuse_put_request(fc, req);
if (!err) {
struct inode *inode = entry->d_inode;
- /* Set nlink to zero so the inode can be cleared, if
- the inode does have more links this will be
- discovered at the next lookup/getattr */
+ /*
+ * Set nlink to zero so the inode can be cleared, if the inode
+ * does have more links this will be discovered at the next
+ * lookup/getattr.
+ */
clear_nlink(inode);
fuse_invalidate_attr(inode);
fuse_invalidate_attr(dir);
req->in.numargs = 1;
req->in.args[0].size = entry->d_name.len + 1;
req->in.args[0].value = entry->d_name.name;
- request_send(fc, req);
+ fuse_request_send(fc, req);
err = req->out.h.error;
fuse_put_request(fc, req);
if (!err) {
req->in.args[1].value = oldent->d_name.name;
req->in.args[2].size = newent->d_name.len + 1;
req->in.args[2].value = newent->d_name.name;
- request_send(fc, req);
+ fuse_request_send(fc, req);
err = req->out.h.error;
fuse_put_request(fc, req);
if (!err) {
else
req->out.args[0].size = sizeof(outarg);
req->out.args[0].value = &outarg;
- request_send(fc, req);
+ fuse_request_send(fc, req);
err = req->out.h.error;
fuse_put_request(fc, req);
if (!err) {
req->in.numargs = 1;
req->in.args[0].size = sizeof(inarg);
req->in.args[0].value = &inarg;
- request_send(fc, req);
+ fuse_request_send(fc, req);
err = req->out.h.error;
fuse_put_request(fc, req);
if (err == -ENOSYS) {
req->num_pages = 1;
req->pages[0] = page;
fuse_read_fill(req, file, inode, file->f_pos, PAGE_SIZE, FUSE_READDIR);
- request_send(fc, req);
+ fuse_request_send(fc, req);
nbytes = req->out.args[0].size;
err = req->out.h.error;
fuse_put_request(fc, req);
req->out.numargs = 1;
req->out.args[0].size = PAGE_SIZE - 1;
req->out.args[0].value = link;
- request_send(fc, req);
+ fuse_request_send(fc, req);
if (req->out.h.error) {
free_page((unsigned long) link);
link = ERR_PTR(req->out.h.error);
else
req->out.args[0].size = sizeof(outarg);
req->out.args[0].value = &outarg;
- request_send(fc, req);
+ fuse_request_send(fc, req);
err = req->out.h.error;
fuse_put_request(fc, req);
if (err) {
req->in.args[1].value = name;
req->in.args[2].size = size;
req->in.args[2].value = value;
- request_send(fc, req);
+ fuse_request_send(fc, req);
err = req->out.h.error;
fuse_put_request(fc, req);
if (err == -ENOSYS) {
req->out.args[0].size = sizeof(outarg);
req->out.args[0].value = &outarg;
}
- request_send(fc, req);
+ fuse_request_send(fc, req);
ret = req->out.h.error;
if (!ret)
ret = size ? req->out.args[0].size : outarg.size;
req->out.args[0].size = sizeof(outarg);
req->out.args[0].value = &outarg;
}
- request_send(fc, req);
+ fuse_request_send(fc, req);
ret = req->out.h.error;
if (!ret)
ret = size ? req->out.args[0].size : outarg.size;
req->in.numargs = 1;
req->in.args[0].size = strlen(name) + 1;
req->in.args[0].value = name;
- request_send(fc, req);
+ fuse_request_send(fc, req);
err = req->out.h.error;
fuse_put_request(fc, req);
if (err == -ENOSYS) {
/*
FUSE: Filesystem in Userspace
- Copyright (C) 2001-2006 Miklos Szeredi <miklos@szeredi.hu>
+ Copyright (C) 2001-2008 Miklos Szeredi <miklos@szeredi.hu>
This program can be distributed under the terms of the GNU GPL.
See the file COPYING.
req->out.numargs = 1;
req->out.args[0].size = sizeof(*outargp);
req->out.args[0].value = outargp;
- request_send(fc, req);
+ fuse_request_send(fc, req);
err = req->out.h.error;
fuse_put_request(fc, req);
return err;
}
-struct fuse_file *fuse_file_alloc(void)
+struct fuse_file *fuse_file_alloc(struct fuse_conn *fc)
{
struct fuse_file *ff;
ff = kmalloc(sizeof(struct fuse_file), GFP_KERNEL);
} else {
INIT_LIST_HEAD(&ff->write_entry);
atomic_set(&ff->count, 0);
+ spin_lock(&fc->lock);
+ ff->kh = ++fc->khctr;
+ spin_unlock(&fc->lock);
}
+ RB_CLEAR_NODE(&ff->polled_node);
+ init_waitqueue_head(&ff->poll_wait);
}
return ff;
}
{
dput(req->misc.release.dentry);
mntput(req->misc.release.vfsmount);
- fuse_put_request(fc, req);
}
static void fuse_file_put(struct fuse_file *ff)
struct inode *inode = req->misc.release.dentry->d_inode;
struct fuse_conn *fc = get_fuse_conn(inode);
req->end = fuse_release_end;
- request_send_background(fc, req);
+ fuse_request_send_background(fc, req);
kfree(ff);
}
}
int fuse_open_common(struct inode *inode, struct file *file, int isdir)
{
+ struct fuse_conn *fc = get_fuse_conn(inode);
struct fuse_open_out outarg;
struct fuse_file *ff;
int err;
if (err)
return err;
- ff = fuse_file_alloc();
+ ff = fuse_file_alloc(fc);
if (!ff)
return -ENOMEM;
spin_lock(&fc->lock);
list_del(&ff->write_entry);
+ if (!RB_EMPTY_NODE(&ff->polled_node))
+ rb_erase(&ff->polled_node, &fc->polled_files);
spin_unlock(&fc->lock);
+
+ wake_up_interruptible_sync(&ff->poll_wait);
/*
* Normally this will send the RELEASE request,
* however if some asynchronous READ or WRITE requests
req->in.args[0].size = sizeof(inarg);
req->in.args[0].value = &inarg;
req->force = 1;
- request_send(fc, req);
+ fuse_request_send(fc, req);
err = req->out.h.error;
fuse_put_request(fc, req);
if (err == -ENOSYS) {
req->in.numargs = 1;
req->in.args[0].size = sizeof(inarg);
req->in.args[0].value = &inarg;
- request_send(fc, req);
+ fuse_request_send(fc, req);
err = req->out.h.error;
fuse_put_request(fc, req);
if (err == -ENOSYS) {
inarg->read_flags |= FUSE_READ_LOCKOWNER;
inarg->lock_owner = fuse_lock_owner_id(fc, owner);
}
- request_send(fc, req);
+ fuse_request_send(fc, req);
return req->out.args[0].size;
}
}
if (req->ff)
fuse_file_put(req->ff);
- fuse_put_request(fc, req);
}
static void fuse_send_readpages(struct fuse_req *req, struct file *file,
struct fuse_file *ff = file->private_data;
req->ff = fuse_file_get(ff);
req->end = fuse_readpages_end;
- request_send_background(fc, req);
+ fuse_request_send_background(fc, req);
} else {
- request_send(fc, req);
+ fuse_request_send(fc, req);
fuse_readpages_end(fc, req);
+ fuse_put_request(fc, req);
}
}
}
}
req->pages[req->num_pages] = page;
- req->num_pages ++;
+ req->num_pages++;
return 0;
}
inarg->write_flags |= FUSE_WRITE_LOCKOWNER;
inarg->lock_owner = fuse_lock_owner_id(fc, owner);
}
- request_send(fc, req);
+ fuse_request_send(fc, req);
return req->misc.write.out.size;
}
{
__free_page(req->pages[0]);
fuse_file_put(req->ff);
- fuse_put_request(fc, req);
}
static void fuse_writepage_finish(struct fuse_conn *fc, struct fuse_req *req)
/* Called under fc->lock, may release and reacquire it */
static void fuse_send_writepage(struct fuse_conn *fc, struct fuse_req *req)
+__releases(&fc->lock)
+__acquires(&fc->lock)
{
struct fuse_inode *fi = get_fuse_inode(req->inode);
loff_t size = i_size_read(req->inode);
req->in.args[1].size = inarg->size;
fi->writectr++;
- request_send_background_locked(fc, req);
+ fuse_request_send_background_locked(fc, req);
return;
out_free:
fuse_writepage_finish(fc, req);
spin_unlock(&fc->lock);
fuse_writepage_free(fc, req);
+ fuse_put_request(fc, req);
spin_lock(&fc->lock);
}
* Called with fc->lock
*/
void fuse_flush_writepages(struct inode *inode)
+__releases(&fc->lock)
+__acquires(&fc->lock)
{
struct fuse_conn *fc = get_fuse_conn(inode);
struct fuse_inode *fi = get_fuse_inode(inode);
req->out.numargs = 1;
req->out.args[0].size = sizeof(outarg);
req->out.args[0].value = &outarg;
- request_send(fc, req);
+ fuse_request_send(fc, req);
err = req->out.h.error;
fuse_put_request(fc, req);
if (!err)
return PTR_ERR(req);
fuse_lk_fill(req, file, fl, opcode, pid, flock);
- request_send(fc, req);
+ fuse_request_send(fc, req);
err = req->out.h.error;
/* locking is restartable */
if (err == -EINTR)
req->out.numargs = 1;
req->out.args[0].size = sizeof(outarg);
req->out.args[0].value = &outarg;
- request_send(fc, req);
+ fuse_request_send(fc, req);
err = req->out.h.error;
fuse_put_request(fc, req);
if (err == -ENOSYS)
return retval;
}
+static int fuse_ioctl_copy_user(struct page **pages, struct iovec *iov,
+ unsigned int nr_segs, size_t bytes, bool to_user)
+{
+ struct iov_iter ii;
+ int page_idx = 0;
+
+ if (!bytes)
+ return 0;
+
+ iov_iter_init(&ii, iov, nr_segs, bytes, 0);
+
+ while (iov_iter_count(&ii)) {
+ struct page *page = pages[page_idx++];
+ size_t todo = min_t(size_t, PAGE_SIZE, iov_iter_count(&ii));
+ void *kaddr, *map;
+
+ kaddr = map = kmap(page);
+
+ while (todo) {
+ char __user *uaddr = ii.iov->iov_base + ii.iov_offset;
+ size_t iov_len = ii.iov->iov_len - ii.iov_offset;
+ size_t copy = min(todo, iov_len);
+ size_t left;
+
+ if (!to_user)
+ left = copy_from_user(kaddr, uaddr, copy);
+ else
+ left = copy_to_user(uaddr, kaddr, copy);
+
+ if (unlikely(left))
+ return -EFAULT;
+
+ iov_iter_advance(&ii, copy);
+ todo -= copy;
+ kaddr += copy;
+ }
+
+ kunmap(map);
+ }
+
+ return 0;
+}
+
+/*
+ * For ioctls, there is no generic way to determine how much memory
+ * needs to be read and/or written. Furthermore, ioctls are allowed
+ * to dereference the passed pointer, so the parameter requires deep
+ * copying but FUSE has no idea whatsoever about what to copy in or
+ * out.
+ *
+ * This is solved by allowing FUSE server to retry ioctl with
+ * necessary in/out iovecs. Let's assume the ioctl implementation
+ * needs to read in the following structure.
+ *
+ * struct a {
+ * char *buf;
+ * size_t buflen;
+ * }
+ *
+ * On the first callout to FUSE server, inarg->in_size and
+ * inarg->out_size will be NULL; then, the server completes the ioctl
+ * with FUSE_IOCTL_RETRY set in out->flags, out->in_iovs set to 1 and
+ * the actual iov array to
+ *
+ * { { .iov_base = inarg.arg, .iov_len = sizeof(struct a) } }
+ *
+ * which tells FUSE to copy in the requested area and retry the ioctl.
+ * On the second round, the server has access to the structure and
+ * from that it can tell what to look for next, so on the invocation,
+ * it sets FUSE_IOCTL_RETRY, out->in_iovs to 2 and iov array to
+ *
+ * { { .iov_base = inarg.arg, .iov_len = sizeof(struct a) },
+ * { .iov_base = a.buf, .iov_len = a.buflen } }
+ *
+ * FUSE will copy both struct a and the pointed buffer from the
+ * process doing the ioctl and retry ioctl with both struct a and the
+ * buffer.
+ *
+ * This time, FUSE server has everything it needs and completes ioctl
+ * without FUSE_IOCTL_RETRY which finishes the ioctl call.
+ *
+ * Copying data out works the same way.
+ *
+ * Note that if FUSE_IOCTL_UNRESTRICTED is clear, the kernel
+ * automatically initializes in and out iovs by decoding @cmd with
+ * _IOC_* macros and the server is not allowed to request RETRY. This
+ * limits ioctl data transfers to well-formed ioctls and is the forced
+ * behavior for all FUSE servers.
+ */
+static long fuse_file_do_ioctl(struct file *file, unsigned int cmd,
+ unsigned long arg, unsigned int flags)
+{
+ struct inode *inode = file->f_dentry->d_inode;
+ struct fuse_file *ff = file->private_data;
+ struct fuse_conn *fc = get_fuse_conn(inode);
+ struct fuse_ioctl_in inarg = {
+ .fh = ff->fh,
+ .cmd = cmd,
+ .arg = arg,
+ .flags = flags
+ };
+ struct fuse_ioctl_out outarg;
+ struct fuse_req *req = NULL;
+ struct page **pages = NULL;
+ struct page *iov_page = NULL;
+ struct iovec *in_iov = NULL, *out_iov = NULL;
+ unsigned int in_iovs = 0, out_iovs = 0, num_pages = 0, max_pages;
+ size_t in_size, out_size, transferred;
+ int err;
+
+ /* assume all the iovs returned by client always fits in a page */
+ BUILD_BUG_ON(sizeof(struct iovec) * FUSE_IOCTL_MAX_IOV > PAGE_SIZE);
+
+ if (!fuse_allow_task(fc, current))
+ return -EACCES;
+
+ err = -EIO;
+ if (is_bad_inode(inode))
+ goto out;
+
+ err = -ENOMEM;
+ pages = kzalloc(sizeof(pages[0]) * FUSE_MAX_PAGES_PER_REQ, GFP_KERNEL);
+ iov_page = alloc_page(GFP_KERNEL);
+ if (!pages || !iov_page)
+ goto out;
+
+ /*
+ * If restricted, initialize IO parameters as encoded in @cmd.
+ * RETRY from server is not allowed.
+ */
+ if (!(flags & FUSE_IOCTL_UNRESTRICTED)) {
+ struct iovec *iov = page_address(iov_page);
+
+ iov->iov_base = (void __user *)arg;
+ iov->iov_len = _IOC_SIZE(cmd);
+
+ if (_IOC_DIR(cmd) & _IOC_WRITE) {
+ in_iov = iov;
+ in_iovs = 1;
+ }
+
+ if (_IOC_DIR(cmd) & _IOC_READ) {
+ out_iov = iov;
+ out_iovs = 1;
+ }
+ }
+
+ retry:
+ inarg.in_size = in_size = iov_length(in_iov, in_iovs);
+ inarg.out_size = out_size = iov_length(out_iov, out_iovs);
+
+ /*
+ * Out data can be used either for actual out data or iovs,
+ * make sure there always is at least one page.
+ */
+ out_size = max_t(size_t, out_size, PAGE_SIZE);
+ max_pages = DIV_ROUND_UP(max(in_size, out_size), PAGE_SIZE);
+
+ /* make sure there are enough buffer pages and init request with them */
+ err = -ENOMEM;
+ if (max_pages > FUSE_MAX_PAGES_PER_REQ)
+ goto out;
+ while (num_pages < max_pages) {
+ pages[num_pages] = alloc_page(GFP_KERNEL | __GFP_HIGHMEM);
+ if (!pages[num_pages])
+ goto out;
+ num_pages++;
+ }
+
+ req = fuse_get_req(fc);
+ if (IS_ERR(req)) {
+ err = PTR_ERR(req);
+ req = NULL;
+ goto out;
+ }
+ memcpy(req->pages, pages, sizeof(req->pages[0]) * num_pages);
+ req->num_pages = num_pages;
+
+ /* okay, let's send it to the client */
+ req->in.h.opcode = FUSE_IOCTL;
+ req->in.h.nodeid = get_node_id(inode);
+ req->in.numargs = 1;
+ req->in.args[0].size = sizeof(inarg);
+ req->in.args[0].value = &inarg;
+ if (in_size) {
+ req->in.numargs++;
+ req->in.args[1].size = in_size;
+ req->in.argpages = 1;
+
+ err = fuse_ioctl_copy_user(pages, in_iov, in_iovs, in_size,
+ false);
+ if (err)
+ goto out;
+ }
+
+ req->out.numargs = 2;
+ req->out.args[0].size = sizeof(outarg);
+ req->out.args[0].value = &outarg;
+ req->out.args[1].size = out_size;
+ req->out.argpages = 1;
+ req->out.argvar = 1;
+
+ fuse_request_send(fc, req);
+ err = req->out.h.error;
+ transferred = req->out.args[1].size;
+ fuse_put_request(fc, req);
+ req = NULL;
+ if (err)
+ goto out;
+
+ /* did it ask for retry? */
+ if (outarg.flags & FUSE_IOCTL_RETRY) {
+ char *vaddr;
+
+ /* no retry if in restricted mode */
+ err = -EIO;
+ if (!(flags & FUSE_IOCTL_UNRESTRICTED))
+ goto out;
+
+ in_iovs = outarg.in_iovs;
+ out_iovs = outarg.out_iovs;
+
+ /*
+ * Make sure things are in boundary, separate checks
+ * are to protect against overflow.
+ */
+ err = -ENOMEM;
+ if (in_iovs > FUSE_IOCTL_MAX_IOV ||
+ out_iovs > FUSE_IOCTL_MAX_IOV ||
+ in_iovs + out_iovs > FUSE_IOCTL_MAX_IOV)
+ goto out;
+
+ err = -EIO;
+ if ((in_iovs + out_iovs) * sizeof(struct iovec) != transferred)
+ goto out;
+
+ /* okay, copy in iovs and retry */
+ vaddr = kmap_atomic(pages[0], KM_USER0);
+ memcpy(page_address(iov_page), vaddr, transferred);
+ kunmap_atomic(vaddr, KM_USER0);
+
+ in_iov = page_address(iov_page);
+ out_iov = in_iov + in_iovs;
+
+ goto retry;
+ }
+
+ err = -EIO;
+ if (transferred > inarg.out_size)
+ goto out;
+
+ err = fuse_ioctl_copy_user(pages, out_iov, out_iovs, transferred, true);
+ out:
+ if (req)
+ fuse_put_request(fc, req);
+ if (iov_page)
+ __free_page(iov_page);
+ while (num_pages)
+ __free_page(pages[--num_pages]);
+ kfree(pages);
+
+ return err ? err : outarg.result;
+}
+
+static long fuse_file_ioctl(struct file *file, unsigned int cmd,
+ unsigned long arg)
+{
+ return fuse_file_do_ioctl(file, cmd, arg, 0);
+}
+
+static long fuse_file_compat_ioctl(struct file *file, unsigned int cmd,
+ unsigned long arg)
+{
+ return fuse_file_do_ioctl(file, cmd, arg, FUSE_IOCTL_COMPAT);
+}
+
+/*
+ * All files which have been polled are linked to RB tree
+ * fuse_conn->polled_files which is indexed by kh. Walk the tree and
+ * find the matching one.
+ */
+static struct rb_node **fuse_find_polled_node(struct fuse_conn *fc, u64 kh,
+ struct rb_node **parent_out)
+{
+ struct rb_node **link = &fc->polled_files.rb_node;
+ struct rb_node *last = NULL;
+
+ while (*link) {
+ struct fuse_file *ff;
+
+ last = *link;
+ ff = rb_entry(last, struct fuse_file, polled_node);
+
+ if (kh < ff->kh)
+ link = &last->rb_left;
+ else if (kh > ff->kh)
+ link = &last->rb_right;
+ else
+ return link;
+ }
+
+ if (parent_out)
+ *parent_out = last;
+ return link;
+}
+
+/*
+ * The file is about to be polled. Make sure it's on the polled_files
+ * RB tree. Note that files once added to the polled_files tree are
+ * not removed before the file is released. This is because a file
+ * polled once is likely to be polled again.
+ */
+static void fuse_register_polled_file(struct fuse_conn *fc,
+ struct fuse_file *ff)
+{
+ spin_lock(&fc->lock);
+ if (RB_EMPTY_NODE(&ff->polled_node)) {
+ struct rb_node **link, *parent;
+
+ link = fuse_find_polled_node(fc, ff->kh, &parent);
+ BUG_ON(*link);
+ rb_link_node(&ff->polled_node, parent, link);
+ rb_insert_color(&ff->polled_node, &fc->polled_files);
+ }
+ spin_unlock(&fc->lock);
+}
+
+static unsigned fuse_file_poll(struct file *file, poll_table *wait)
+{
+ struct inode *inode = file->f_dentry->d_inode;
+ struct fuse_file *ff = file->private_data;
+ struct fuse_conn *fc = get_fuse_conn(inode);
+ struct fuse_poll_in inarg = { .fh = ff->fh, .kh = ff->kh };
+ struct fuse_poll_out outarg;
+ struct fuse_req *req;
+ int err;
+
+ if (fc->no_poll)
+ return DEFAULT_POLLMASK;
+
+ poll_wait(file, &ff->poll_wait, wait);
+
+ /*
+ * Ask for notification iff there's someone waiting for it.
+ * The client may ignore the flag and always notify.
+ */
+ if (waitqueue_active(&ff->poll_wait)) {
+ inarg.flags |= FUSE_POLL_SCHEDULE_NOTIFY;
+ fuse_register_polled_file(fc, ff);
+ }
+
+ req = fuse_get_req(fc);
+ if (IS_ERR(req))
+ return PTR_ERR(req);
+
+ req->in.h.opcode = FUSE_POLL;
+ req->in.h.nodeid = get_node_id(inode);
+ req->in.numargs = 1;
+ req->in.args[0].size = sizeof(inarg);
+ req->in.args[0].value = &inarg;
+ req->out.numargs = 1;
+ req->out.args[0].size = sizeof(outarg);
+ req->out.args[0].value = &outarg;
+ fuse_request_send(fc, req);
+ err = req->out.h.error;
+ fuse_put_request(fc, req);
+
+ if (!err)
+ return outarg.revents;
+ if (err == -ENOSYS) {
+ fc->no_poll = 1;
+ return DEFAULT_POLLMASK;
+ }
+ return POLLERR;
+}
+
+/*
+ * This is called from fuse_handle_notify() on FUSE_NOTIFY_POLL and
+ * wakes up the poll waiters.
+ */
+int fuse_notify_poll_wakeup(struct fuse_conn *fc,
+ struct fuse_notify_poll_wakeup_out *outarg)
+{
+ u64 kh = outarg->kh;
+ struct rb_node **link;
+
+ spin_lock(&fc->lock);
+
+ link = fuse_find_polled_node(fc, kh, NULL);
+ if (*link) {
+ struct fuse_file *ff;
+
+ ff = rb_entry(*link, struct fuse_file, polled_node);
+ wake_up_interruptible_sync(&ff->poll_wait);
+ }
+
+ spin_unlock(&fc->lock);
+ return 0;
+}
+
static const struct file_operations fuse_file_operations = {
.llseek = fuse_file_llseek,
.read = do_sync_read,
.lock = fuse_file_lock,
.flock = fuse_file_flock,
.splice_read = generic_file_splice_read,
+ .unlocked_ioctl = fuse_file_ioctl,
+ .compat_ioctl = fuse_file_compat_ioctl,
+ .poll = fuse_file_poll,
};
static const struct file_operations fuse_direct_io_file_operations = {
.fsync = fuse_fsync,
.lock = fuse_file_lock,
.flock = fuse_file_flock,
+ .unlocked_ioctl = fuse_file_ioctl,
+ .compat_ioctl = fuse_file_compat_ioctl,
+ .poll = fuse_file_poll,
/* no mmap and splice_read */
};
/*
FUSE: Filesystem in Userspace
- Copyright (C) 2001-2006 Miklos Szeredi <miklos@szeredi.hu>
+ Copyright (C) 2001-2008 Miklos Szeredi <miklos@szeredi.hu>
This program can be distributed under the terms of the GNU GPL.
See the file COPYING.
#include <linux/backing-dev.h>
#include <linux/mutex.h>
#include <linux/rwsem.h>
+#include <linux/rbtree.h>
+#include <linux/poll.h>
/** Max number of pages that can be used in a single read request */
#define FUSE_MAX_PAGES_PER_REQ 32
/** Request reserved for flush and release */
struct fuse_req *reserved_req;
+ /** Kernel file handle guaranteed to be unique */
+ u64 kh;
+
/** File handle used by userspace */
u64 fh;
/** Entry on inode's write_files list */
struct list_head write_entry;
+
+ /** RB node to be linked on fuse_conn->polled_files */
+ struct rb_node polled_node;
+
+ /** Wait queue head for poll */
+ wait_queue_head_t poll_wait;
};
/** One input argument of a request */
/** The list of requests under I/O */
struct list_head io;
+ /** The next unique kernel file handle */
+ u64 khctr;
+
+ /** rbtree of fuse_files waiting for poll events indexed by ph */
+ struct rb_root polled_files;
+
/** Number of requests currently in the background */
unsigned num_background;
/** Connection failed (version mismatch). Cannot race with
setting other bitfields since it is only set once in INIT
reply, before any other request, and never cleared */
- unsigned conn_error : 1;
+ unsigned conn_error:1;
/** Connection successful. Only set in INIT */
- unsigned conn_init : 1;
+ unsigned conn_init:1;
/** Do readpages asynchronously? Only set in INIT */
- unsigned async_read : 1;
+ unsigned async_read:1;
/** Do not send separate SETATTR request before open(O_TRUNC) */
- unsigned atomic_o_trunc : 1;
+ unsigned atomic_o_trunc:1;
/** Filesystem supports NFS exporting. Only set in INIT */
- unsigned export_support : 1;
+ unsigned export_support:1;
/*
* The following bitfields are only for optimization purposes
*/
/** Is fsync not implemented by fs? */
- unsigned no_fsync : 1;
+ unsigned no_fsync:1;
/** Is fsyncdir not implemented by fs? */
- unsigned no_fsyncdir : 1;
+ unsigned no_fsyncdir:1;
/** Is flush not implemented by fs? */
- unsigned no_flush : 1;
+ unsigned no_flush:1;
/** Is setxattr not implemented by fs? */
- unsigned no_setxattr : 1;
+ unsigned no_setxattr:1;
/** Is getxattr not implemented by fs? */
- unsigned no_getxattr : 1;
+ unsigned no_getxattr:1;
/** Is listxattr not implemented by fs? */
- unsigned no_listxattr : 1;
+ unsigned no_listxattr:1;
/** Is removexattr not implemented by fs? */
- unsigned no_removexattr : 1;
+ unsigned no_removexattr:1;
/** Are file locking primitives not implemented by fs? */
- unsigned no_lock : 1;
+ unsigned no_lock:1;
/** Is access not implemented by fs? */
- unsigned no_access : 1;
+ unsigned no_access:1;
/** Is create not implemented by fs? */
- unsigned no_create : 1;
+ unsigned no_create:1;
/** Is interrupt not implemented by fs? */
- unsigned no_interrupt : 1;
+ unsigned no_interrupt:1;
/** Is bmap not implemented by fs? */
- unsigned no_bmap : 1;
+ unsigned no_bmap:1;
+
+ /** Is poll not implemented by fs? */
+ unsigned no_poll:1;
/** Do multi-page cached writes */
- unsigned big_writes : 1;
+ unsigned big_writes:1;
/** The number of requests waiting for completion */
atomic_t num_waiting;
/** Version counter for attribute changes */
u64 attr_version;
+
+ /** Called on final put */
+ void (*release)(struct fuse_conn *);
};
static inline struct fuse_conn *get_fuse_conn_super(struct super_block *sb)
*/
int fuse_open_common(struct inode *inode, struct file *file, int isdir);
-struct fuse_file *fuse_file_alloc(void);
+struct fuse_file *fuse_file_alloc(struct fuse_conn *fc);
void fuse_file_free(struct fuse_file *ff);
void fuse_finish_open(struct inode *inode, struct file *file,
struct fuse_file *ff, struct fuse_open_out *outarg);
int fuse_fsync_common(struct file *file, struct dentry *de, int datasync,
int isdir);
+/**
+ * Notify poll wakeup
+ */
+int fuse_notify_poll_wakeup(struct fuse_conn *fc,
+ struct fuse_notify_poll_wakeup_out *outarg);
+
/**
* Initialize file operations on a regular file
*/
/**
* Send a request (synchronous)
*/
-void request_send(struct fuse_conn *fc, struct fuse_req *req);
+void fuse_request_send(struct fuse_conn *fc, struct fuse_req *req);
/**
* Send a request with no reply
*/
-void request_send_noreply(struct fuse_conn *fc, struct fuse_req *req);
+void fuse_request_send_noreply(struct fuse_conn *fc, struct fuse_req *req);
/**
* Send a request in the background
*/
-void request_send_background(struct fuse_conn *fc, struct fuse_req *req);
+void fuse_request_send_background(struct fuse_conn *fc, struct fuse_req *req);
-void request_send_background_locked(struct fuse_conn *fc, struct fuse_req *req);
+void fuse_request_send_background_locked(struct fuse_conn *fc,
+ struct fuse_req *req);
/* Abort all requests */
void fuse_abort_conn(struct fuse_conn *fc);
*/
struct fuse_conn *fuse_conn_get(struct fuse_conn *fc);
+/**
+ * Initialize fuse_conn
+ */
+int fuse_conn_init(struct fuse_conn *fc, struct super_block *sb);
+
/**
* Release reference to fuse_conn
*/
/*
FUSE: Filesystem in Userspace
- Copyright (C) 2001-2006 Miklos Szeredi <miklos@szeredi.hu>
+ Copyright (C) 2001-2008 Miklos Szeredi <miklos@szeredi.hu>
This program can be distributed under the terms of the GNU GPL.
See the file COPYING.
unsigned rootmode;
unsigned user_id;
unsigned group_id;
- unsigned fd_present : 1;
- unsigned rootmode_present : 1;
- unsigned user_id_present : 1;
- unsigned group_id_present : 1;
+ unsigned fd_present:1;
+ unsigned rootmode_present:1;
+ unsigned user_id_present:1;
+ unsigned group_id_present:1;
unsigned flags;
unsigned max_read;
unsigned blksize;
req->in.numargs = 1;
req->in.args[0].size = sizeof(struct fuse_forget_in);
req->in.args[0].value = inarg;
- request_send_noreply(fc, req);
+ fuse_request_send_noreply(fc, req);
}
static void fuse_clear_inode(struct inode *inode)
fi = get_fuse_inode(inode);
spin_lock(&fc->lock);
- fi->nlookup ++;
+ fi->nlookup++;
spin_unlock(&fc->lock);
fuse_change_attributes(inode, attr, attr_valid, attr_version);
fc->destroy_req = NULL;
req->in.h.opcode = FUSE_DESTROY;
req->force = 1;
- request_send(fc, req);
+ fuse_request_send(fc, req);
fuse_put_request(fc, req);
}
}
req->out.args[0].size =
fc->minor < 4 ? FUSE_COMPAT_STATFS_SIZE : sizeof(outarg);
req->out.args[0].value = &outarg;
- request_send(fc, req);
+ fuse_request_send(fc, req);
err = req->out.h.error;
if (!err)
convert_fuse_statfs(buf, &outarg.st);
return 0;
}
-static struct fuse_conn *new_conn(struct super_block *sb)
+int fuse_conn_init(struct fuse_conn *fc, struct super_block *sb)
{
- struct fuse_conn *fc;
int err;
- fc = kzalloc(sizeof(*fc), GFP_KERNEL);
- if (fc) {
- spin_lock_init(&fc->lock);
- mutex_init(&fc->inst_mutex);
- atomic_set(&fc->count, 1);
- init_waitqueue_head(&fc->waitq);
- init_waitqueue_head(&fc->blocked_waitq);
- init_waitqueue_head(&fc->reserved_req_waitq);
- INIT_LIST_HEAD(&fc->pending);
- INIT_LIST_HEAD(&fc->processing);
- INIT_LIST_HEAD(&fc->io);
- INIT_LIST_HEAD(&fc->interrupts);
- INIT_LIST_HEAD(&fc->bg_queue);
- atomic_set(&fc->num_waiting, 0);
- fc->bdi.ra_pages = (VM_MAX_READAHEAD * 1024) / PAGE_CACHE_SIZE;
- fc->bdi.unplug_io_fn = default_unplug_io_fn;
- /* fuse does it's own writeback accounting */
- fc->bdi.capabilities = BDI_CAP_NO_ACCT_WB;
- fc->dev = sb->s_dev;
- err = bdi_init(&fc->bdi);
- if (err)
- goto error_kfree;
- if (sb->s_bdev) {
- err = bdi_register(&fc->bdi, NULL, "%u:%u-fuseblk",
- MAJOR(fc->dev), MINOR(fc->dev));
- } else {
- err = bdi_register_dev(&fc->bdi, fc->dev);
- }
- if (err)
- goto error_bdi_destroy;
- /*
- * For a single fuse filesystem use max 1% of dirty +
- * writeback threshold.
- *
- * This gives about 1M of write buffer for memory maps on a
- * machine with 1G and 10% dirty_ratio, which should be more
- * than enough.
- *
- * Privileged users can raise it by writing to
- *
- * /sys/class/bdi/<bdi>/max_ratio
- */
- bdi_set_max_ratio(&fc->bdi, 1);
- fc->reqctr = 0;
- fc->blocked = 1;
- fc->attr_version = 1;
- get_random_bytes(&fc->scramble_key, sizeof(fc->scramble_key));
+ memset(fc, 0, sizeof(*fc));
+ spin_lock_init(&fc->lock);
+ mutex_init(&fc->inst_mutex);
+ atomic_set(&fc->count, 1);
+ init_waitqueue_head(&fc->waitq);
+ init_waitqueue_head(&fc->blocked_waitq);
+ init_waitqueue_head(&fc->reserved_req_waitq);
+ INIT_LIST_HEAD(&fc->pending);
+ INIT_LIST_HEAD(&fc->processing);
+ INIT_LIST_HEAD(&fc->io);
+ INIT_LIST_HEAD(&fc->interrupts);
+ INIT_LIST_HEAD(&fc->bg_queue);
+ INIT_LIST_HEAD(&fc->entry);
+ atomic_set(&fc->num_waiting, 0);
+ fc->bdi.ra_pages = (VM_MAX_READAHEAD * 1024) / PAGE_CACHE_SIZE;
+ fc->bdi.unplug_io_fn = default_unplug_io_fn;
+ /* fuse does it's own writeback accounting */
+ fc->bdi.capabilities = BDI_CAP_NO_ACCT_WB;
+ fc->khctr = 0;
+ fc->polled_files = RB_ROOT;
+ fc->dev = sb->s_dev;
+ err = bdi_init(&fc->bdi);
+ if (err)
+ goto error_mutex_destroy;
+ if (sb->s_bdev) {
+ err = bdi_register(&fc->bdi, NULL, "%u:%u-fuseblk",
+ MAJOR(fc->dev), MINOR(fc->dev));
+ } else {
+ err = bdi_register_dev(&fc->bdi, fc->dev);
}
- return fc;
+ if (err)
+ goto error_bdi_destroy;
+ /*
+ * For a single fuse filesystem use max 1% of dirty +
+ * writeback threshold.
+ *
+ * This gives about 1M of write buffer for memory maps on a
+ * machine with 1G and 10% dirty_ratio, which should be more
+ * than enough.
+ *
+ * Privileged users can raise it by writing to
+ *
+ * /sys/class/bdi/<bdi>/max_ratio
+ */
+ bdi_set_max_ratio(&fc->bdi, 1);
+ fc->reqctr = 0;
+ fc->blocked = 1;
+ fc->attr_version = 1;
+ get_random_bytes(&fc->scramble_key, sizeof(fc->scramble_key));
-error_bdi_destroy:
+ return 0;
+
+ error_bdi_destroy:
bdi_destroy(&fc->bdi);
-error_kfree:
+ error_mutex_destroy:
mutex_destroy(&fc->inst_mutex);
- kfree(fc);
- return NULL;
+ return err;
}
+EXPORT_SYMBOL_GPL(fuse_conn_init);
void fuse_conn_put(struct fuse_conn *fc)
{
fuse_request_free(fc->destroy_req);
mutex_destroy(&fc->inst_mutex);
bdi_destroy(&fc->bdi);
- kfree(fc);
+ fc->release(fc);
}
}
return fc;
}
-static struct inode *get_root_inode(struct super_block *sb, unsigned mode)
+static struct inode *fuse_get_root_inode(struct super_block *sb, unsigned mode)
{
struct fuse_attr attr;
memset(&attr, 0, sizeof(attr));
return fuse_iget(sb, 1, 0, &attr, 0, 0);
}
-struct fuse_inode_handle
-{
+struct fuse_inode_handle {
u64 nodeid;
u32 generation;
};
fc->max_write = max_t(unsigned, 4096, fc->max_write);
fc->conn_init = 1;
}
- fuse_put_request(fc, req);
fc->blocked = 0;
wake_up_all(&fc->blocked_waitq);
}
req->out.args[0].size = sizeof(struct fuse_init_out);
req->out.args[0].value = &req->misc.init_out;
req->end = process_init_reply;
- request_send_background(fc, req);
+ fuse_request_send_background(fc, req);
+}
+
+static void fuse_free_conn(struct fuse_conn *fc)
+{
+ kfree(fc);
}
static int fuse_fill_super(struct super_block *sb, void *data, int silent)
if (file->f_op != &fuse_dev_operations)
return -EINVAL;
- fc = new_conn(sb);
+ fc = kmalloc(sizeof(*fc), GFP_KERNEL);
if (!fc)
return -ENOMEM;
+ err = fuse_conn_init(fc, sb);
+ if (err) {
+ kfree(fc);
+ return err;
+ }
+
+ fc->release = fuse_free_conn;
fc->flags = d.flags;
fc->user_id = d.user_id;
fc->group_id = d.group_id;
sb->s_fs_info = fc;
err = -ENOMEM;
- root = get_root_inode(sb, d.rootmode);
+ root = fuse_get_root_inode(sb, d.rootmode);
if (!root)
goto err;
static void fuse_inode_init_once(void *foo)
{
- struct inode * inode = foo;
+ struct inode *inode = foo;
inode_init_once(inode);
}
{
int res;
- printk("fuse init (API version %i.%i)\n",
+ printk(KERN_INFO "fuse init (API version %i.%i)\n",
FUSE_KERNEL_VERSION, FUSE_KERNEL_MINOR_VERSION);
INIT_LIST_HEAD(&fuse_conn_list);
/*
FUSE: Filesystem in Userspace
- Copyright (C) 2001-2006 Miklos Szeredi <miklos@szeredi.hu>
+ Copyright (C) 2001-2008 Miklos Szeredi <miklos@szeredi.hu>
This program can be distributed under the terms of the GNU GPL.
See the file COPYING.
*
* 7.10
* - add nonseekable open flag
+ *
+ * 7.11
+ * - add IOCTL message
+ * - add unsolicited notification support
+ * - add POLL message and NOTIFY_POLL notification
*/
#ifndef _LINUX_FUSE_H
#define _LINUX_FUSE_H
-#include <asm/types.h>
-#include <linux/major.h>
+#include <linux/types.h>
/** Version number of this interface */
#define FUSE_KERNEL_VERSION 7
/** Minor version number of this interface */
-#define FUSE_KERNEL_MINOR_VERSION 10
+#define FUSE_KERNEL_MINOR_VERSION 11
/** The node ID of the root inode */
#define FUSE_ROOT_ID 1
-/** The major number of the fuse character device */
-#define FUSE_MAJOR MISC_MAJOR
-
-/** The minor number of the fuse character device */
-#define FUSE_MINOR 229
-
/* Make sure all structures are padded to 64bit boundary, so 32bit
userspace works under 64bit kernels */
*/
#define FUSE_READ_LOCKOWNER (1 << 1)
+/**
+ * Ioctl flags
+ *
+ * FUSE_IOCTL_COMPAT: 32bit compat ioctl on 64bit machine
+ * FUSE_IOCTL_UNRESTRICTED: not restricted to well-formed ioctls, retry allowed
+ * FUSE_IOCTL_RETRY: retry with new iovecs
+ *
+ * FUSE_IOCTL_MAX_IOV: maximum of in_iovecs + out_iovecs
+ */
+#define FUSE_IOCTL_COMPAT (1 << 0)
+#define FUSE_IOCTL_UNRESTRICTED (1 << 1)
+#define FUSE_IOCTL_RETRY (1 << 2)
+
+#define FUSE_IOCTL_MAX_IOV 256
+
+/**
+ * Poll flags
+ *
+ * FUSE_POLL_SCHEDULE_NOTIFY: request poll notify
+ */
+#define FUSE_POLL_SCHEDULE_NOTIFY (1 << 0)
+
enum fuse_opcode {
FUSE_LOOKUP = 1,
FUSE_FORGET = 2, /* no reply */
FUSE_INTERRUPT = 36,
FUSE_BMAP = 37,
FUSE_DESTROY = 38,
+ FUSE_IOCTL = 39,
+ FUSE_POLL = 40,
+};
+
+enum fuse_notify_code {
+ FUSE_NOTIFY_POLL = 1,
+ FUSE_NOTIFY_CODE_MAX,
};
/* The read buffer is required to be at least 8k, but may be much larger */
__u64 block;
};
+struct fuse_ioctl_in {
+ __u64 fh;
+ __u32 flags;
+ __u32 cmd;
+ __u64 arg;
+ __u32 in_size;
+ __u32 out_size;
+};
+
+struct fuse_ioctl_out {
+ __s32 result;
+ __u32 flags;
+ __u32 in_iovs;
+ __u32 out_iovs;
+};
+
+struct fuse_poll_in {
+ __u64 fh;
+ __u64 kh;
+ __u32 flags;
+ __u32 padding;
+};
+
+struct fuse_poll_out {
+ __u32 revents;
+ __u32 padding;
+};
+
+struct fuse_notify_poll_wakeup_out {
+ __u64 kh;
+};
+
struct fuse_in_header {
__u32 len;
__u32 opcode;
#include <linux/module.h>
#include <linux/major.h>
-#define PSMOUSE_MINOR 1
-#define MS_BUSMOUSE_MINOR 2
-#define ATIXL_BUSMOUSE_MINOR 3
-/*#define AMIGAMOUSE_MINOR 4 FIXME OBSOLETE */
-#define ATARIMOUSE_MINOR 5
-#define SUN_MOUSE_MINOR 6
-#define APOLLO_MOUSE_MINOR 7
-#define PC110PAD_MINOR 9
-/*#define ADB_MOUSE_MINOR 10 FIXME OBSOLETE */
+#define PSMOUSE_MINOR 1
+#define MS_BUSMOUSE_MINOR 2
+#define ATIXL_BUSMOUSE_MINOR 3
+/*#define AMIGAMOUSE_MINOR 4 FIXME OBSOLETE */
+#define ATARIMOUSE_MINOR 5
+#define SUN_MOUSE_MINOR 6
+#define APOLLO_MOUSE_MINOR 7
+#define PC110PAD_MINOR 9
+/*#define ADB_MOUSE_MINOR 10 FIXME OBSOLETE */
#define WATCHDOG_MINOR 130 /* Watchdog timer */
#define TEMP_MINOR 131 /* Temperature Sensor */
-#define RTC_MINOR 135
+#define RTC_MINOR 135
#define EFI_RTC_MINOR 136 /* EFI Time services */
-#define SUN_OPENPROM_MINOR 139
+#define SUN_OPENPROM_MINOR 139
#define DMAPI_MINOR 140 /* DMAPI */
-#define NVRAM_MINOR 144
-#define SGI_MMTIMER 153
+#define NVRAM_MINOR 144
+#define SGI_MMTIMER 153
#define STORE_QUEUE_MINOR 155
-#define I2O_MINOR 166
+#define I2O_MINOR 166
#define MICROCODE_MINOR 184
-#define MWAVE_MINOR 219 /* ACP/Mwave Modem */
-#define MPT_MINOR 220
-#define MISC_DYNAMIC_MINOR 255
-
-#define TUN_MINOR 200
-#define HPET_MINOR 228
-#define KVM_MINOR 232
+#define TUN_MINOR 200
+#define MWAVE_MINOR 219 /* ACP/Mwave Modem */
+#define MPT_MINOR 220
+#define HPET_MINOR 228
+#define FUSE_MINOR 229
+#define KVM_MINOR 232
+#define MISC_DYNAMIC_MINOR 255
struct device;
git.openpandora.org / pandora-kernel.git / commitdiff